Most of the stories were decent, but a few very obviously demonstrated that the authors weren’t paying attention in the main storyline.
One had a basic class quickly killing a creature with over 70,000 HP. John Lee struggles to do so as a high level Master class.
Another’s whole story is around a guy with alzheimer’s. Which doesn’t make any sense, since the system automatically cures all non-system generated diseases and injuries upon integration. Another story even had some get cured of alzheimer’s.
If these stories weren’t tied to the System Apocalypse series, they’d be good. But as it is, its like watching a director butcher a novel’s concepts because he thinks he can do it better.